Enjoy Music Wirelessly: Bluetooth receiver can be connected to non-Bluetooth car audio systems, stereos, wired speakers and headphones via the 3.5mm AUX adapter; And equipped with Bluetooth 5.0 chip for stable connection / fast transmission / wide signal range. Just pair it with your phone and start listening to your favorite musicAmazing Sound Quality: Our Bluetooth Aux Receiver adopts the latest noise cancellation and digital signal processor (DSP) technologies, which can eliminate echo and block intrusive background noise, giving you call sounds crystalline.4 Hours Battery Life: The working time of this aux bluetooth receiver is up to 4 hours when making calls or playing music. And it only takes 1.5 hours to fully charge the device using a USB fast charging cable (included in the package). In addition, this Bluetooth music adapter can be used while charging, which is very convenient.Double Connection: The portable Bluetooth receiver can be paired with 2 devices at the same time. You can enjoy your music and never worry about missing calls. Once paired, the car stereo will automatically reconnect to your last paired Bluetooth devices, as long as they are within wireless range.Wide Compatibility: Bluetooth 5.0 receiver compatible with most smartphones, ideal for home or vehicle audio systems. (Like: computer, TV, projector (transmit mode) / speaker, earphone (receive mode)).